feat(exception email): add log method for email exception data

Closes #2

force-app/main/default/classes/Rollbar.cls

@@ -1,4 +1,11 @@
+/**
+ * Installation:
+ * 1. Add api.rollbar.com in `Remote Sites` in Salesforce Setup.
+ * 2. Add email service in `Email Services` in Salesforce Setup pointint to RollbarExceptionEmailHandler class.
+ * 3. Add Salesforce-generated email address from the added email service to `Apex Exception Email` addresses.
+ */
 public with sharing class Rollbar {
+
     public static Rollbar instance() {
         if (Rollbar.instance == null) {
             Rollbar.instance = new Rollbar();
@@ -25,6 +32,11 @@ public with sharing class Rollbar {
         return instance.notifier.log(exc);
     }
 
+    public static HttpResponse log(ExceptionData exData) {
+        Rollbar instance = initializedInstance();
+        return instance.notifier.log(exData);
+    }
+
     private static Rollbar initializedInstance()
     {
         Rollbar instance = Rollbar.instance();

force-app/main/default/tests/RollbarTest.cls

@@ -19,4 +19,24 @@ public class RollbarTest {
 
         System.assertEquals(200, response.getStatusCode());
     }
+
+    @isTest
+    public static void testLogExceptionData() {
+        Test.setMock(HttpCalloutMock.class, new RollbarApiCalloutMock());
+
+        Map<String, Object> exDataMap = new Map<String, Object>();
+        exDataMap.put('environment', 'Sandbox');
+        exDataMap.put('organization', 'TestOrg');
+        exDataMap.put('className', 'TestClass');
+        exDataMap.put('message', 'Test exception message');
+        exDataMap.put('fileName', 'Class.ClassWithExceptionThrown.someMethod');
+        exDataMap.put('context', 'Exception context');
+        exDataMap.put('line', 14);
+        exDataMap.put('column', 12);
+
+        Rollbar.init('foo', 'test');
+        HttpResponse response = Rollbar.log(ExceptionData.fromMap(exDataMap));
+
+        System.assertEquals(200, response.getStatusCode());
+    }
 }